SYMMETRY OF MATTER
We can see water vapor condensing when we
watch clouds. A cloud is nothing more than water vapor that has condensed
back to a liquid form. A cloud is made of extremely tiny drops of water which
can remain suspended in the air. A cloud is a colloid, or 2 states of
matter (liquid and air). As a cloud grows, and more and more water condense
in the same place, the cloud droplets get larger. Eventually, these cloud
droplets will be too large to remain in the air. The cloud is then said to be
saturated. A saturated cloud will usually precipitate its excess
water, or cause it to fall.
The direction of change also has different paths. Solids usually go through a liquid stage before turning into gas. But some substances (like water) can go directly from solid to gas called sublimation. As you learn more about different types of matter the symmetry at the atomic level will hold a key in predicting some of their properties.